plethysmograph

Noun

An instrument used to measure changes in volume within an organ or body part.

ریشه

From the Greek words 'plethysmos' meaning 'increase' and 'graphē' meaning 'writing'.

مثال

• The doctor used a plethysmograph to measure the blood flow in the patient's arm.
• Researchers used a plethysmograph to study lung function in individuals with asthma.
• The plethysmograph recorded the changes in volume of the heart during exercise.